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AP and TS EAMCET Engineering Model Paper 8

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Question : 108

Total: 160

The length of a potentiometer wire is 1 m and its resistance is 4 Ω. A current of 5 mA is flowing in it. An unknown source of emf is balanced on 40 cm length of this wire, then the e.m.f of the source is

8 mV
20 V
20 mV
8 V

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